package com.example.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.dto.DishDto;
import com.example.entity.Dish;
import com.example.entity.DishFlavor;
import com.example.mapper.DishMapper;
import com.example.service.DishFlavorService;
import com.example.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.xml.ws.Action;
import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {
    @Autowired
    private DishFlavorService dishFlavorService;
    /**
     * 新增菜品，同时保存对应的口味数据
     * @param dishDto
     */
    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品的基本信息到菜品表dish
        this.save(dishDto);
        //菜品id
        Long dishId=dishDto.getId();
        //菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishId);
            return item;
        }).collect(Collectors.toList());
        //保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(flavors);
    }
    //根据id查询菜品信息和口味信息
    @Override
    public DishDto getByIdWithFlavor(Long id) {
        Dish dish = this.getById(id);

        DishDto dishDto=new DishDto();
        BeanUtils.copyProperties(dish,dishDto);

        LambdaQueryWrapper<DishFlavor> lqw=new LambdaQueryWrapper<>();
        lqw.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> list = dishFlavorService.list(lqw);
        dishDto.setFlavors(list);

        return dishDto;
    }

    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基础数据
        this.updateById(dishDto);
        //清理当前菜品对应的口味信息--dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> lqw=new LambdaQueryWrapper<>();
        lqw.eq(DishFlavor::getDishId,dishDto.getId());

        dishFlavorService.remove(lqw);
        //添加当前提交过来的口味数据--dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();

        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());

        dishFlavorService.saveBatch(flavors);
    }
    //删除菜品信息和口味信息
    @Override
    public void deleteWithFlavor(List<Long> ids) {
        //删除菜品信息
        this.removeByIds(ids);
        //清理当前菜品对应的口味信息--dish_flavor表的delete操作
        for (int i=0;i<ids.size();i++){
            LambdaQueryWrapper<DishFlavor> lqw=new LambdaQueryWrapper<>();
            lqw.eq(DishFlavor::getDishId,ids.get(i));
            //删除口味信息
            dishFlavorService.remove(lqw);
        }


    }
}
